Tommos

Hi all, I currently have the Corsair Hydro Series H115i Pro 280mm Liquid CPU Cooler, i'm wanting to upgrade the fans to RGB and have a couple of questions. 1. Which fans should i go with? 2. Where abouts do i connect these fans to control the RPM in relation to the cpu temp like the old ones do aswell as the RGB. I have the corsair commander, will i connect them to this or somewhere else? Thanks